How do you know when to replace an air stone? I've been using one for five months, and it still seems just fine, but I've got a pack of replacements. How do you know when you have to replace it?
I say they are good til they quit working or quit working as well as they should.
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Just what I wanted to hear! I think the pet store guy that sold me the replacement pack was just padding the sale. I'll leave it be until it doesn't bubble as much, if that even happens. Good to hear people have used the same stone for 3 and 4 years.Ive never replaced one. Had the same one running for close to three years.